Objective To describe the time trend of esophageal and gastric cardia adenocarcinomas in Chongqing of China in the past 30 years .Methods The medical records of all patients who underwent gastroscopy from Janaury 1983 to December 2012 at the Southwest hospital were reviewed .The rate of endoscopic detection and proportion of adenocarcinoma in all upper gastrointestinal tumors (esophageal adenocarcinoma ,esophageal squamous cell carcinoma ,gastric cardia adenocarcinoma and gastric non-cardiac ad-enocarcinoma) were compiled and serial comparisons were made .Results 435 829 patients who underwent gastroscopy were re-viewed .Totally ,there were 352 patients with esophageal adenocarcinomas(0 .08% ) ,10 301 with esophageal squamous cell carcino-mas(2 .40% ) ,3 058 with gastric cardia adenocarcinomas(0 .70% ) and 5 543 with gastric non-cardiac adenocarcinomas(1 .30% ) .O-ver the 30-year period ,the rate of endoscopic detection of esophageal adenocarcinomas did not show a statistically significant .How-ever ,the proportion of esophageal adenocarcinomas increased from 1 .90% to 3 .20% ,suggesting an increased proportions .The rate of endoscopic detection of gastric cardia adenocarcinomas increased from 0 .70% to 0 .81% and the proportions of gastric cardia ade-nocarcinomas increased from 25 .30% to 38 .30% .Conclusion Over the 30-year period ,it seems that the incidence of esophageal adenocarcinoma had increased .An increasing trend of gastric cardia adenocarcinoma is also observed in this study ,especially in male patients .

Data of 643 patients who underwent endoscopic polypectomy with high-frequency electrotome in 6 hospitals of Sichuan Province between June 2020 and September 2020 were summarized. The rate of complete polypectomy and the incidence of delayed post-polypectomy bleeding (DPPB) and perforation were analyzed. DPPB occurred in 18 cases (2.80%) and postoperative perforation occurred in 1 case (0.16%). All of the 1 828 polyps were completely resected (100.0%). Univariate analysis showed that polyps′ diameter≥10 mm, long peduncle or laterally spreading tumor (LST), adenomatous polyp, endoscopic mucosal resection, mixed cutting mode 1 of electrocoagulation were significantly correlated with DPPB( P<0.05). Multivariate Logistic regression analysis revealed that polyp diameter≥10 mm ( P=0.001, OR=3.575, 95% CI: 1.175-9.955), morphology of long peduncle or LST ( P=0.004, OR=2.981, 95% CI: 1.233-14.858) were independent risk factors for DPPB. Endoscopic colorectal polypectomy with high-frequency electrotome is effective and safe. Polyps′ diameter≥10 mm, polyps with long pedicle or LST are the risk factors for DPPB.